Battle of Callann
1261 CE.
Shown on the map at 51.889°, -9.439°.
The Battle of Callann was fought in August 1261 between the English of Ireland, under John FitzGerald, and three Irish clans: MacCarthy, who held the Kingdom of Desmond, under Fínghin Mac Carthaigh, King of Desmond, ancestor of the MacCarthy Reagh dynasty. It took place in the townland of Callann or Collon near modern-day Kilgarvan, County Kerry. MacCarthaigh was victorious.
Text from the Wikipedia article Battle of Callann, licensed CC BY-SA 4.0.